<!DOCTYPE html>
<html lang="en">
<head>
	<meta charset="UTF-8">
	<title>079-布局-浮动元素高度塌陷.html</title>
	<style>
		*{
			margin: 0;
			padding: 0;
		}
		.father{
			border: 1px	solid #000;
		}
		.son{
			height: 100px;
			float: left;
		}
	</style>
</head>
<body>
	<div class="father">
		<div class="son"></div>
	</div>
</body>
</html>